Heat exchanger mounting

ABSTRACT

Resilient elements are provided for the mounting of a heat exchanger core between structurally joined inlet and outlet ducts.

United States Patent [1 1 Perpall Dec. 4, 1973 HEAT EXCHANGER MOUNTING [75] Inventor: Robert C. Perpall, Palos Verdes Peninsula, Calif.

[73] Assignee: The Garrett Corporation, Los

Angeles, Calif.

[22] Filed: Jan. 31, 1972 [21] Appl. No.: 222,125

[52] US. Cl. 60/13 R, 165/69, 165/166, 123/119 CD [51] Int. Cl. F02b 37/04, F28f 7/00 [58] Field of Search 165/69, 82, 83, 166;

[56] I References Cited UNITED STATES PATENTS 2,512,748 6/1950 Lucke 165/83 l/l880 Boyle 285/368 3,610,324 10/1971 Davidson. 165/69 2,340,853 2/1944 Young 165/69 1,840,417 l/l932 Seefert 165/69 2,004,151 6/1935 Angstman 165/69 FOREIGN PATENTS OR APPLICATIONS,

877,353 9/1961 Great Britain l. 165/82 Primary Examiner-Carlton R. Croyle Assistant Examiner-Warren Olsen Attorney-Albert J. Miller et al.

[5 7] ABSTRACT Resilient elements are provided for the mounting of a heat exchanger core between structurally joined inlet and outlet ducts.

30 Claims, 7 Drawing Figures 1 HEAT EXCHANGER MOUNTING BACKGROUND OF THE INVENTION It has been conventional to provide heat exchangers with integral flanges which are used to mount or install the heat exchanger in its intended environment. It is necessary to machine both the heat exchanger flanges and the corresponding flanges to which they are to be attached. Mounting of the heat exchanger in this fashion subjects the heat exchanger core to any structural or vibratory loads associated with the system to which the'heat exchanger is mounted.

It has recently been proposed to utilize separate heat exchangers in connection with vehicular engines, in particular to cool engine intake air which has been compressed by a turbocharger compressor. This cooling is required in order to increase the air density and to reduce the overall general temperature load of the engine. As the horse power rating of the vehicular en'- gines has increased, the conventional water cooling systerns are proving to be inadequate for this additional cooling load. The mounting of a heat exchanger in this environment places severe burdens on the conventional heat exchangers ability to remain structurally sound for an acceptable operating. life.

SUMMARY OF THE INVENTION The present invention provides a heat exchanger particularly adaptable for use in generally adverse environments. Theheat exchanger core is provided with a gasket or sealing element of a resilient or elastomeric material on both the inlet face and outlet face thereof.

This gasket may extend a short distance around the side of the heat exchanger core away from the inlet and outlet faces thereof respectively; The heat exchanger core does not include any flanges or other structurally supporting mounting means.

The inlet duct and outlet duct on opposite sides of the heat exchanger are structurally connected to compress the gasket both on the inlet and outlet faces of the heat exchangercore and along the side edges of the inlet and outlet faces thereof.

BRIEF DESCRIPTION OF THE DMWINGS FIG. 1 is a frontal elevation of the heat exchanger core of the present invention;

FIG. 2 is a side elevation of the heat exchanger core of the present invention;

DESCRIPTION OF THE PREFERRED EMBODIMENTS The heat exchanger mounting of the present invention is applicable to all types'of heat exchangers including cross flow, eounterflow, tubular, plate-fin, etc. For purposes of illustration, FIGS. 1, 2 and 3 illustrate a conventional, cross flow, plate-fin heat exchanger including offset corrugated tins in the separate fluid passageways. The frontal view shown. in FIG. 1 illustrates the inletface 11 of the high pressure side or hot fluid side of the heat exchanger core 10. The hot fluid or high pressure passages 12 separated by header bars 14 to prevent hot fluid flow into the cold fluid passages are also shown. The resilient material or elastomeric gasket 16 is shown extending around the entire periphery of the inlet face 11 of the heat exchanger core 10. As more clearly shown in FIGS. 2 and 3, the gasket 16 in- "cludes a side extension or wrap around portion 18 which extends around two opposed edges of the heat exchanger inlet face 11. The side view of the heat exchanger core 10 illustrated in FIG. 2, shows the low pressure inlet face which includes cold fluid passageways 20 and side header bars 22. The top view, FIG. 3, is partially cut away to show a cold fluid passage 20 and hot fluid passage 12,

The configuration of the gasket 16 is more clearly illustrated in FIGS. .4, 5 and 6. The gasket includes a first flat face 30 which abuts the inlet face 11 of the heat exchanger core and a second flat face 32 disposed at a angle to the first flat face 30 to extend along the side face 19 of the heat exchanger core 10 adjacent to the inlet face 11. The main portion of the gasket, which extends around the entire inlet face 11, includes an outwardprojection 34 having a substantially flat outer surface disposed at a slight angle from the plane of the inlet face 11.

As shown inFIGS. 5 and 6, the inlet duct associated with the heat exchanger core 10 will include a flange 40 having a flat face in substantially the same plane as the inlet face 11. of the heat exchanger core 10 so as to compress the gasket projection 34 towards the same plane as the inlet face 11. The inletduct would also include a flange 42 to compress the side extending or wrap around portion 18 of the gasket 16 along the face 19 of the heat exchanger core 10. This flange 42 should be slightly flared to facilitate positioning of the core 10 and compression of the gasket.

As shown in FIG. 7, the heat exchanger mounting of the present invention is particularly adapted for use in adverse environments such as on a vehicular engine. The heat exchanger core 10, including a gasket 16 on both the hot fluid inlet and outlet faces thereof, is disposed between a compressed air duct 50 which receives compressed air from an engine turbocharger compressor 52, and the engine inlet manifold 54 which includes a manifold duct 56. The compressed air duct 50 and inlet manifold duct 56 includes flanges 58 and 60 respectively to engage the gaskets 16 on the heat exchanger core 10. A plurality of tie rods 62, together with structural sections of the inlet manifold duct 56, are used to join the compressed air duct 50 and inlet manifold duct 56 to secure the heat exchanger core 10 therebetween. Cooled air may be passed through the low pressure or cold side of the heat exchanger core 10 by a tip-turbine driven fan 64 which is driven by a portion of the compressed air from the turbocharger compressor 52 through bypass duct 66.

The gasket 16 may be of any resilient material such as a silicone elastomer (Silastic, a trademark of Dow Coming). The gasket material must be selected to provide reasonable life when subjected to the operating environment in which the heat exchanger is to be used. The gasket in most instances would be bonded to the inlet and outlet faces in the heat exchanger core by a Room Temperature vulcanizing (RTV) Silicone Elastomer. The core can then be inserted directly into the cavity in the ducts carrying the fluid to be cooled and the assembly squeezed to a predetermined dimension by means of the tie bolts or other flange joining means.

In this manner the heat exchanger core does not require any integral flanges or machining operations prior to its use. Further, the ducts in which the heat exchanger core is to be inserted can be of cast material and likewise do not require any machining operations before use.

Mounting of the heat exchanger in this manner provides that the inlet and outlet ducts take substantially all of the structural load. The heat exchanger core is thus not required to carry any load. Further, this method of heat exchanger mounting easily accommodates any thermal expansion in either the heat exchanger core or the inlet and outlet ducts.

The side extending positions of the gaskets provide considerable resistance to vibration in all directions. This wrap around feature is exceedingly important in the vehicular applications. In order to insure that the resonant vibration frequency of the heat exchanger core is always higher than any driving frequency present, the squeeze or pressure on the gasket should be controlled.

Heat exchangers mounted in accordance with the present invention provide adequate sealing for the high pressure or hot fluid, while effectively preventing vibratory, thermal expansion or rigging stress from being transmitted to the fragile heat exchanger core. In addition, the mounting costs are reduced since no machining operations are required. Further the heat exchanger core can be easily replaced or removed for cleaning without damaging or replacing the more costly ducts.

While specific embodiments of the invention have been illustrated and described, it is to be understood that these embodiments are provided'by way of example only and that the invention is not to be construed as being limited thereto, but only by the proper scope of the following claims.

What I claim is:

1. In combination: I

a heat exchanger core having a high pressure inlet face and a high pressure outlet face;

a first resilient gasket disposed around the periphery of the high pressure inlet face of said heat exchanger core;

a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core;

an inlet duct disposed to provide high pressure fluid to the high pressure inlet face of said heat exchanger core;

an outlet duct disposed to receive high pressure fluid from the high pressure outlet face of said heat exchanger core; and

means disposed between said inlet duct and said outlet duct to structurally join said inlet duct and said outlet duct around said heat exchanger core, said duct joining means at least partially compressing the first resilient gasket between the inlet duct and the high pressure inlet face of said heat exchanger core and at least partially compressing the second resilient gasket between the outlet duct and the high pressure outlet face of said heat exchanger core.

2. The combination of claim 1 wherein said first and second resilient gaskets are of a silicone elastomer.

3. The combination of claim 1 wherein said duct joining means includes a plurality of tie rods extending between said inlet duct and said outlet duct.

4. The combination of claim 1 wherein said heat exchanger core is of the cross flow, plate-fin type.

5. The combination of claim 1 wherein said first and second resilient gaskets are bonded to the heat exchanger core inlet and outlet faces respectively by a room temperature vulcanizing silicone elastomer.

6. The combination of claim 1 wherein said heat exchanger core inlet and outlet faces are substantially rectangular.

7. The combination of claim 1 wherein said inlet duct receives compressed air from an exhaust gas driven turbocharger compressor and said outlet duct provides cooled compressed air from the heat exchanger core to the intake manifold of the engine which produced the exhaust gases to drive the turbocharger.

8. The combination of claim 7 and in addition cooling air driving means operably associated with said heat exchanger core, said cooling air driving means driven by compressed air from the turbocharger compressor.

9. The combination of claim 8 wherein said cooling air driving means is a tip turbine driven fan.

10. In combination:

a heat exchanger core having a high pressure inlet face and a high pressure outlet face;

a first resilient gasket disposed around the periphery of the high pressure inlet face of said heat exchanger core, said first resilient gasket having an inner substantially flat face in contact with the inlet face of said heat exchanger core and an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom;

a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core, said second resilient gasket having an inner substantially flat face in contact with the outlet face of said heat exchanger core and an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom;

an inlet duct disposed to provide high pressure fluid to the high pressure inlet face of said heat exchanger core;

an outlet duct disposed to receive high pressure fluid from the high pressure outlet face of said heat exchanger core; and

means disposed between said inlet duct and said outlet duct to structurally join said inlet duct and said outlet duct around said heat exchanger core, said duct joining means at least partially compressing the projecting outer face of the first resilient gasket towards the inner face thereof between the inlet duct and the high pressure inlet face of said heat exchanger core and at least partially compressing the projecting outer face of the second resilient gasket toward the inner face thereof between the outlet duct and the high pressure outlet face of said heat exchanger core.

11. The combination of claim 10 wherein said first and second resilient gaskets are of a silicone elastomer.

12. The combination of claim 10 wherein said duct joining means includes a plurality of tie rods extending between said ducts.

13. The combination of claim wherein said heat exchanger core'is of the cross flow, plate-fin type.

14. The combination of claim 10 wherein said first and second resilient gaskets are bonded to the heat exchanger. core inlet and outlet faces respectively by a room temperaturevulcanizing silicone elastomer.

15. The combination of claim. 10 wherein said heat exchanger core inlet and outlet faces are substantially rectangular.

16. In combination:

a heat exchanger core having a high pressure inlet face, an opposedhigh pressure outlet face, and two low pressure faces extending therebetween;

a first resilient gasket disposed around the periphery of the high pressure inlet face of said. heat exchanger core, said first resilient gasket having a first inner substantially flat face in contact with the inlet face of said heat exchanger core, an outer substantially flat face generally opposed to said inner flatface and projecting slightly outward therefrom, and a second substantially flat inner face in contact with at least a portion of the edge of the low pres sure faces adjacent said inlet face;

a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core, said second resilient gasket having a first inner substantially flat face in contact with the outlet face of said heat exchanger core, an outer substantially flat face generally opposed to said r inner flat face and projecting slightly outward therefrom, and a second substantially flat inner face in contact with at least a portion of the edge of the low pressure faces adjacent said outlet face;

an inlet duct disposed to receive the high pressure inlet face of said heat exchanger core and to provide high pressure fluid thereto;

an outlet duct di'sposedto receive the high pressure outlet face of said heat exchanger core and to receive high pressure fluid therefrom;

means disposed between said inlet duct and said outlet duct to structurally join said inlet duct and said outlet duct around said heat exchanger core, said duct joining means at least partially compressing the first resilient gasket between the inlet duct and the high pressure inlet face and adjacent side faces of said heat exchanger core and at least partially compressing the second resilient gasket between the outlet duct and the high pressure outlet face and adjacent side faces of said heat exchanger core.

17. In combination:

a heat exchanger core having a high pressure inlet face, an opposed high pressure outlet face, and two low pressure faces extending therebetween;

a first resilient gasket disposed around the periphery of the high pressure inlet face of said heat exchanger core, said first resilient gasket having a first inner substantiallyflat face in contact with the inlet face of said heat exchanger core, an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom, and a second substantially flat inner face in contact with at least a portion of the edge of the low pressure faces adjacent said inlet face;

a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core, said second resilient gasket having a first inner substantially flat face in contact with the ,outlet face of said heat exchanger core, an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom, and a second substantially flat inner face in contact with at leasta portion of the edge of the low pressure faces adjacent said outlet face;

an inlet duct disposed to provide high pressure fluid to the high pressure inlet face of said heat exchanger, said inletduct having a heat exchanger core inlet face receiving flange;

an outlet duct disposed to receive high pressure fluid from the high pressure outlet. faceof said heat exchanger, said outlet duct having a heat exchanger core outlet face receiving flange, and

means disposed between said inlet duct heat exchanger inlet face receivingflange and said outlet duct heat exchanger outlet face receiving flange to structurally join said flanges around said heat exchanger core, said duct joining means at least partially compressing thefirst resilient gasket between i the inlet duct and the high pressure inlet face and adjacent side faces of said heat exchanger core and at least partially compressing the second resilient gasket between the outlet duct and the high pressure outlet face and adjacent side faces of said heat exchanger core.

18. The combination of claim 17 wherein said first and second resilient gaskets are of a silicone elastomer.

19. The combination of claim 17 wherein said duct joining rneans includes a plurality of tie rods extending between said flanges.

20. The combination of claim 17 wherein said heat exchanger core is of the cross flow, plate-fin type.

21. The combination of claim 17 wherein said first and second resilient gaskets are bonded to the heat exchanger core inletand outlet faces respectively by a room temperature vulcanizing silicone elastomer.

22. The combination of claim 17 wherein said heat exchanger core inlet and outlet faces are substantially rectangular. I

23. The combination of claim 17 wherein said inlet duct receives compressed air from an exhaust gas driven turbocharger compressor and said outlet duct provides cooled compressed air from the heat exchanger core to the intake manifold of the engine which produced the exhaust gases to drive the turbocharger.

24. The combination of claim 23 and in addition cooling air driving means operably associated with said heat exchanger core, said cooling air driving means driven by compressed air from the turbocharger compressor.

25. The combination of claim 24 wherein said cooling. air driving means is a tip turbine driven fan.

26. The combination of claim 17 wherein said heat exchanger, core inlet face receiving flange has a flared opening to receive said inlet face and said heat exchanger core outlet face receiving flange has a flared opening to receive said outlet face.

27. In combination:

a heat exchanger core having a high pressure inlet face and a high pressure outlet face;

a first resilient gasket disposed around the periphery of the high pressure inlet face of said heat exchanger core;

a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core;

an engine to propel a vehicle, said engine producing exhaust gases and having an intake manifold to receive compressed combustion air;

a turbocharger mounted on said engine to receive exhaust gases therefrom and produce compressed combustion air for said engine;

said turbocharger having a compressed air duct to provide compressed air to the high pressure inlet face of said heat exchanger core;

said inlet manifold having a duct to receive compressedair from the high pressure outlet face of said heat exchanger core; and

means disposed between said turbocharger compressed air duct and said inlet manifold duct to structurally join said ducts around said heat exchanger core, said duct joining means at least parand second resilient gaskets are of a silicone elastomer.

29. The comination of claim 27 wherein said first and second resilient gaskets are bonded to the heat exchanger core inlet and outlet faces respectively by a room temperature vulcanizing silicone elastomer.

30. The combination of claim 27 wherein said first and second resilient gaskets wrap around at least two opposed edges of the heat exchanger core inlet and outlet faces respectively. 

1. In combination: a heat exchanger core having a high pressure inlet face and a high pressure outlet face; a first resilient gasket disposed around the periphery of the high pressure inlet face of said heat exchanger core; a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core; an inlet duct disposed to provide high pressure fluid to the high pressure inlet face of said heat exchanger core; an outlet duct disposed to receive high pressure fluid from the high pressure outlet face of said heat exchanger core; and means disposed between said inlet duct and said outlet duct to structurally join said inlet duct and said outlet duct around said heat exchanger core, said duct joining means at least partially compressing the first resilient gasket between the inlet duct and the high pressure inlet face of said heat exchanger core and at least partially compressing the second resilient gasket between the outlet duct and the high pressure outlet face of said heat exchanger core.
 2. The combination of claim 1 wherein said first and second resilient gaskets are of a silicone elastomer.
 3. The combination of claim 1 wherein said duct joining means includes a plurality of tie rods extending between said inlet duct and said outlet duct.
 4. The combination of claim 1 wherein said heat exchanger core is of the cross flow, plate-fin type.
 5. The combination of claim 1 wherein said first and second resilient gaskets are bonded to the heat exchanger core inlet and outlet faces respectively by a room temperature vulcanizing silicone elastomer.
 6. The combination of claim 1 wherein said heat exchanger core inlet and outlet faces are substantially rectangular.
 7. The combination of claim 1 wherein said inlet duct receives compressed air from an exhaust gas driven turbocharger compressor and said outlet duct provides cooled compressed air from the heat exchanger core to the intake manifold of the engine which produced the exhaust gases to drive the turbocharger.
 8. The combination of claim 7 and in addition cooling air driving means operably associated with said heat exchanger core, said cooling air driving means driven by compressed air from the turbocharger compressor.
 9. The combination of claim 8 wherein said cooling air driving means is a tip turbine driven fan.
 10. In combination: a heat exchanger core having a high pressure inlet face and a high pressure outlet face; a first resilient gaSket disposed around the periphery of the high pressure inlet face of said heat exchanger core, said first resilient gasket having an inner substantially flat face in contact with the inlet face of said heat exchanger core and an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom; a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core, said second resilient gasket having an inner substantially flat face in contact with the outlet face of said heat exchanger core and an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom; an inlet duct disposed to provide high pressure fluid to the high pressure inlet face of said heat exchanger core; an outlet duct disposed to receive high pressure fluid from the high pressure outlet face of said heat exchanger core; and means disposed between said inlet duct and said outlet duct to structurally join said inlet duct and said outlet duct around said heat exchanger core, said duct joining means at least partially compressing the projecting outer face of the first resilient gasket towards the inner face thereof between the inlet duct and the high pressure inlet face of said heat exchanger core and at least partially compressing the projecting outer face of the second resilient gasket toward the inner face thereof between the outlet duct and the high pressure outlet face of said heat exchanger core.
 11. The combination of claim 10 wherein said first and second resilient gaskets are of a silicone elastomer.
 12. The combination of claim 10 wherein said duct joining means includes a plurality of tie rods extending between said ducts.
 13. The combination of claim 10 wherein said heat exchanger core is of the cross flow, plate-fin type.
 14. The combination of claim 10 wherein said first and second resilient gaskets are bonded to the heat exchanger core inlet and outlet faces respectively by a room temperature vulcanizing silicone elastomer.
 15. The combination of claim 10 wherein said heat exchanger core inlet and outlet faces are substantially rectangular.
 16. In combination: a heat exchanger core having a high pressure inlet face, an opposed high pressure outlet face, and two low pressure faces extending therebetween; a first resilient gasket disposed around the periphery of the high pressure inlet face of said heat exchanger core, said first resilient gasket having a first inner substantially flat face in contact with the inlet face of said heat exchanger core, an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom, and a second substantially flat inner face in contact with at least a portion of the edge of the low pressure faces adjacent said inlet face; a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core, said second resilient gasket having a first inner substantially flat face in contact with the outlet face of said heat exchanger core, an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom, and a second substantially flat inner face in contact with at least a portion of the edge of the low pressure faces adjacent said outlet face; an inlet duct disposed to receive the high pressure inlet face of said heat exchanger core and to provide high pressure fluid thereto; an outlet duct disposed to receive the high pressure outlet face of said heat exchanger core and to receive high pressure fluid therefrom; means disposed between said inlet duct and said outlet duct to structurally join said inlet duct and said outlet duct around said heat exchanger core, said duct joining means at least partially compressing the first resilient gasket between the inlet duct and the high pressure inlet face and adjacent side faces oF said heat exchanger core and at least partially compressing the second resilient gasket between the outlet duct and the high pressure outlet face and adjacent side faces of said heat exchanger core.
 17. In combination: a heat exchanger core having a high pressure inlet face, an opposed high pressure outlet face, and two low pressure faces extending therebetween; a first resilient gasket disposed around the periphery of the high pressure inlet face of said heat exchanger core, said first resilient gasket having a first inner substantially flat face in contact with the inlet face of said heat exchanger core, an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom, and a second substantially flat inner face in contact with at least a portion of the edge of the low pressure faces adjacent said inlet face; a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core, said second resilient gasket having a first inner substantially flat face in contact with the outlet face of said heat exchanger core, an outer substantially flat face generally opposed to said inner flat face and projecting slightly outward therefrom, and a second substantially flat inner face in contact with at least a portion of the edge of the low pressure faces adjacent said outlet face; an inlet duct disposed to provide high pressure fluid to the high pressure inlet face of said heat exchanger, said inlet duct having a heat exchanger core inlet face receiving flange; an outlet duct disposed to receive high pressure fluid from the high pressure outlet face of said heat exchanger, said outlet duct having a heat exchanger core outlet face receiving flange, and means disposed between said inlet duct heat exchanger inlet face receiving flange and said outlet duct heat exchanger outlet face receiving flange to structurally join said flanges around said heat exchanger core, said duct joining means at least partially compressing the first resilient gasket between the inlet duct and the high pressure inlet face and adjacent side faces of said heat exchanger core and at least partially compressing the second resilient gasket between the outlet duct and the high pressure outlet face and adjacent side faces of said heat exchanger core.
 18. The combination of claim 17 wherein said first and second resilient gaskets are of a silicone elastomer.
 19. The combination of claim 17 wherein said duct joining means includes a plurality of tie rods extending between said flanges.
 20. The combination of claim 17 wherein said heat exchanger core is of the cross flow, plate-fin type.
 21. The combination of claim 17 wherein said first and second resilient gaskets are bonded to the heat exchanger core inlet and outlet faces respectively by a room temperature vulcanizing silicone elastomer.
 22. The combination of claim 17 wherein said heat exchanger core inlet and outlet faces are substantially rectangular.
 23. The combination of claim 17 wherein said inlet duct receives compressed air from an exhaust gas driven turbocharger compressor and said outlet duct provides cooled compressed air from the heat exchanger core to the intake manifold of the engine which produced the exhaust gases to drive the turbocharger.
 24. The combination of claim 23 and in addition cooling air driving means operably associated with said heat exchanger core, said cooling air driving means driven by compressed air from the turbocharger compressor.
 25. The combination of claim 24 wherein said cooling air driving means is a tip turbine driven fan.
 26. The combination of claim 17 wherein said heat exchanger core inlet face receiving flange has a flared opening to receive said inlet face and said heat exchanger core outlet face receiving flange has a flared opening to receive said outlet face.
 27. In combination: a heat exchanger core having a high pressure inlet face and A high pressure outlet face; a first resilient gasket disposed around the periphery of the high pressure inlet face of said heat exchanger core; a second resilient gasket disposed around the periphery of the high pressure outlet face of said heat exchanger core; an engine to propel a vehicle, said engine producing exhaust gases and having an intake manifold to receive compressed combustion air; a turbocharger mounted on said engine to receive exhaust gases therefrom and produce compressed combustion air for said engine; said turbocharger having a compressed air duct to provide compressed air to the high pressure inlet face of said heat exchanger core; said inlet manifold having a duct to receive compressed air from the high pressure outlet face of said heat exchanger core; and means disposed between said turbocharger compressed air duct and said inlet manifold duct to structurally join said ducts around said heat exchanger core, said duct joining means at least partially compressing the first resilient gasket between the turbocharger compressed air duct and the high pressure inlet face of said heat exchanger core and at least partially compressing the second resilient gasket between the inlet manifold duct and the high pressure outlet face of said heat exchanger core.
 28. The combination of claim 27 wherein said first and second resilient gaskets are of a silicone elastomer.
 29. The comination of claim 27 wherein said first and second resilient gaskets are bonded to the heat exchanger core inlet and outlet faces respectively by a room temperature vulcanizing silicone elastomer.
 30. The combination of claim 27 wherein said first and second resilient gaskets wrap around at least two opposed edges of the heat exchanger core inlet and outlet faces respectively. 